Torque and Linear Motion Formula
Periodically, I get questions from users of the site regarding torque and how much is required to move certain masses and a recent user emailed me specifically and it gave me the happy motivation to add this page. :) These masses are things like the gantry, or the z-axis assembly with the router mounted moving on the y-axis, or the just the router mount and router within the z-axis assembly. The question is usually in the form of, can my ??? oz-in motors be used on your CNC machine.

Cutting/Milling Metal with the blackToe CNC Machine
Mark Gottschalk has been cutting metal with his 8 foot long blackToe CNC Machine for a while now. How does he do it? It's a balance of depth per pass, feedrate, the correct end mill and cooling; however, it is possible to cut metals without cooling.